Air and water tube



L C BAYLES AIR AND WATER TUBE Flled Jan 5 1924 HTH l Oll/f a L 0. n

H. k J W F Y, IVJA'JY @de 0- May 25 1926.

Patented May 25, 192@ UNITED VTS f resign FICE.

LEWIS C. BAYLES, 0F EASTON,y PENNSYLVANIA, ASSIGNOR TO INGERSOLIrRANDCOM- PANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

AIR AND WATER TUBE.

Application filed.l January 3, 1924. Serial No. 684,151.y y

This invention relates to fluid actuated percussivc machines, but moreparticularly to rock drills of the hammer type which employconcentrically"arranged liquid conveying and gaseous fluid conveyingtubes for introducing a mixture of liquid andgaseous fluid, such aswater and air, into the drill steel for cleansing the drill hole.

In order to cleanse the drill hole, most rock drills of the hammer typeemploy a tube which extends through the machine and communicates withthe hollow drill steel for lconveying' liquid under pressure, usuallywater, for washing the cuttings from the drill hole. In order that theremaybe sufficient pressure upon this water, some of the pressure fluidwhich is employed for actuating the hammer piston, is usually permittedto escape into the drill steel and mix with the water and thereby createa greater pressure to remove the cuttings'. some circumstances, however,lthere is insufficient pressure fluid escaping past the hammer piston toremove the cuttings and two concentrically arranged tubes'have beenVused, one of which is adaptedto convey gaseous fluid and the'other a.liquid. In this manner the amount of pressure fluid `introduced intot-he drill steel maybe materially increased, so that the removal of thecuttings from the drill hole maybe lefficiently effected. i One objectof this invention is td enable concentrically arranged gaseous lfluidand liquid conveying` tubesto be securely held in place in a rock drillof the hammer type by an improved and simplified means. l Furtherobjects of the invention will hereinafter appear and the invention isshown in one of its preferred forms in the accompanying drawings, inwhich v A Figure l is a side elevational view partly in vertical sectionofa stope drill, and

Figure 2 is an .enlargedfdetail fragmen-4 tary view showing the mannerinwhich the liquid conveying and gaseous fluid conveying tubes are held inplace in a stope drill.

Referring to the drawings, the invention is shown embodied in a stopedrill in which the cylinder A is separated from the front head B by theusual front cylinder bushing C in which is located in this instance, an

anvilV block D. The usual side bolts (not shown)` connect the front headB tothe cylinder A, and a hollow drill steel E is Under adapted toextend into the front head B for receiving the impact'blows of thehammer piston F through the medium of the anvil block D. In thisinstance the hammer piston F serves as the percussive clement andcontrols the distribution of motive fluid for actuating the piston,although a suitable distributing valve may be employed, if desired. Thesupply of motive fluid to the hammer piston is controlled by a suitablethrottle valve Gr preferably located in the back head J and havingahandle H to enable the valve to be readily manipulated. The back head Jin this instance forms `a closurefor the cylinder A although the backhead and cylinder could conceivably be formed in one piece. A rotationhandle K is preferably connected to the back head J for manuallyrotating the machine in order to keep the drill steel E .free in thedrill hole, to obtain efficient drillinf-T- The fluid pressure feedingelement L preferably comprises` a cylinder O, vwhich isin this instanceseparated from the back head J by a head block l), and a piston in thecylinder having a piston rod Q, which is preferably provided with a-rockengaging pointer It will be understood that this invention may beapplied to rock drills of the drifter type and in this event the fluidpressure feeding element is dispensed with.

gether by the usual bolts S and nuts T. As

the above arrangement of elements forms no Vpart of the presentinvention, and is shown Aon the `drawings for illustrative purposesonly, further description is "deemed unnecessary.' Y r A i v Inaccordance with the present invention, concentrically arranged tubes Uand V are preferably held respectively in the back head J and head blockP. The tube V, which is preferably arranged within the tube U isslightly longer than the tube U, and is formed in this instance with atapered endfportion W, which is adapted to extend a short distance intothe drill steel E. The tube 'V in this instance serves to convey liquid,such as water, into the hollow drill steel E for cleansing the drillhole of the cuttings and allaying the dust. The tube U, which ispreferably slightly shorter and of greater cross sectional area thanlthe tube V, eXtends in this instance into the anvil block D and agaseous fluid, such as air, is adapted to be introduced into the tube U.In this manner, amixture of air and water is adapted to take place inthe drill steel and the air creates additional pressure on the Water foreffectively cleansing the drill hole.

In order to hold the tube U in the back head J a collar X is preferablyformed on the tube U adjacent one end thereof and a gland nut Y isadapted to be screwed into the back head J against the collar X andthereby prevents movement of the tube U. The tube Vis preferably formedWith a collar Z adjacent one end thereof, and a resilient packing awhich may be of rubber, is in this instance adapted to surround one endof the tube V, and the collar Z. A sleeve Z) preferably surrounds theresilient packing a and a clamping Washer c surrounds the tube V and inthis instance bears against the collar Z. A gland nut Z is screwed intothe head block P about the sleeve b and in the opposite direction fromthe nut Y and is adapted to force the clamping Washer c against thecollar Z in order to compress the resilient packing a tightly about thetube V and thereby firmly hold the tube in place, so that a fluid tightconnection between the end of the tube V and the head block P may beeffected. Liquid is in this instance introduced into the tube V throughthe passages e and f in the head block P from a suitable connection g.

In order to enable the gland nuts Y and d to be counter-sunk in the backhead J, and head block P respectively, the back head J is in thisinstance formed with a recess s, and the head block P is formed with arecess t. A ring c is preferably inserted in the recesses s and t andenables the back head J and head block P to be centered with respect toeach other.

T he throttle valve G is preferably formed with radial ports h and andthe port h is adapted to communicate with the passage formed in the backhead J, for supplying pressure fluid to the cylinder A for actuating thehammer piston F. Pressure fluid is in this instance supplied to thethrottle valve G through a connection r, and the port j is in thisinstance adapted to be brought into communication with a passage 0 inthe back head J in order to supply pressure fluid to the tube U. Theport j is preferably formed Wide enough to admit pressure fluid to apassage p in the back head J Which communicates with a passage 7) in thehead block P for supplying pressure fluid to the feed cylinder O foractuating the feeding element about the same time pressure fluid issupplied to the tube U. The ports la and j in the valve G are soarranged that the valve may first be actuated to admit pressure fiuid tothe feeding element before pressure fluid is admitted to the tube U andpercussive element. Further movement of the valve Will enable pressureHuid to pass to both the percussive ele-ment and tube U. Pressure fluidmay be shut off from the tube U and percussive element yet be suppliedto the feeding elcmcnt in order tokcepthe machine in operative positionrelative to the drill hole. It is preferable that pressure fluid besupplied to the tube U slightly before it is admitted to the percussiveelement in order to keep the drill hole free from the cuttings.

I claim:

l. In a Huid actuated rock drill, the combination of a percussivecylinder, a back head for the percussive cylinder, a head block forminga closure for the back head, concentric cylindrical recesses in saidhead block and back head cooperating to form a cylindrical pocket Whenthe said parts are assembled, concentrically arranged collared air andWater conducting tubes, a screw threaded gland nut located in the recessin the back head for securing the air tube Within the back head, meansincluding a. screw threaded gland nut and resilient packing located inthe recess in the back head for securing the Water tube within the headblock, a sleeve Within the pocket formed by the said recesses to centerthe back head and head block, and a throttle valve for controlling theadmission of pressure fluid to the percussive cylinder and to the airtube.

2. In a fluid actuated rock drill, the combination of a percussivecylinder, a back head for the percussive cylinder, said back head havingpassages for conducting pressure uid, a head block forming a closure forthe back head, concentric cylindrical recesses in said head block andback head cooperating to form a cylindrical pocket when the said partsare assembled, concentrically collared air and water tubes forconducting cleansing liquid through the percussive cylinder, a gland nutlocated Within the recess in the back head to secure the air tube withinthe back head, a. gland nut and a packing located Within the recess inthe head block to secure the vvater tube within the head block, athrottle valve having passages ad-apted to register with the back headpassages for admitting pressure fluid simultaneously to the percussivecylinder and to the air tube, and means for supplying Water to the Watertube.

3. In a fluid actuated rock drill, the combination of a percussivecylinder, a back head for the percussive cylinder, said back head havingpassages for conducting pressure fluid, a head block forming a closurefor the back head, concentric cylindrical recesses in said headblock andback head eooperating to form a Cylindrical pocket when the said partsare assembled, Concentrically collared air and Water tubes forconducting' cleansingliquid through the peroussive cylinder', a screwthreaded gland in the back head recess to hold the air tube Within theback head and form a fluid tight joint between saidA tube and back head,a threaded gland nut and a packing in the head bloclrrecess for securingthe Water tube adjustably within the head block, a means forcentering),` the baek head and head block, located in the pocket formedby the recesses in the back head and head block, and a throttle Valve tocontrol the admission of pressure luid to the cylinder said throttleValve having passages adapted to register With the back head passagesfor admitting pressure fluid simultaneously to the pereussive cylinderand to the air tube, and means for supplying Water to the Water tube.

In testimony whereof I have signed this specification.

LEWIS C. BAYLES.

